docs: def match(self, p_todo):
          """
          Performs a match on a priority in the todo.
  
          It gets priority from p_todo and compares it with user-entered
          expression based on the given operator (default ==). It does that however
          in reversed order to obtain more intuitive result. Example: (>B) will
          match todos with priority (A).
          Items without priority are designated with corresponding operand set to
          'ZZ', because python doesn't allow NoneType() and str() comparisons.
          """
          operand1 = self.value
          operand2 = p_todo.priority() or 'ZZ'
  
          return self.compare_operands(operand1, operand2)